The K1.8BR spectrometer system at J-PARC

Abstract

A new spectrometer system was designed and constructed at the secondary beam line K1.8BR in the hadron hall of J-PARC to investigate $\bar{K}N$ interactions and $\bar{K}$-nuclear bound systems. The spectrometer consists of a high precision beam line spectrometer, a liquid ${}^3$He/${}^4$He/D${}_2$ target system, a Cylindrical Detector System that surrounds the target to detect the decay particles from the target region, and a neutron time-of-flight counter array located $\sim$15 m downstream from the target position. Details of the design, construction, and performance of the detector components are described.

33 pages, 25 figures

References in corpus (12)

• Effective Kbar N interaction based on chiral SU(3) dynamics
• Variational calculation of the ppK^- system based on chiral SU(3) dynamics
• Indication of a deeply bound compact K-pp state formed in the pp -> p Lambda K+ reaction at 2.85 GeV
• $\bar{K}NN$ quasi-bound state and the $\bar{K}N$ interaction: coupled-channel Faddeev calculations of the $\bar{K}NN-\pi \Sigma N$ system
• The basic K nuclear cluster K- pp and its enhanced formation in the p + p -> K+ + X reaction
• Resonance energy of the barKNN-piYN system
• Variational calculations for K-few-nucleon systems
• Precision measurement of the $3d\to 2p$ x-ray energy in kaonic ${}^4$He
• S-Wave Scattering of Fermion Revisited
• A Novel UV Photon Detector with Resistive Electrodes
• Formation spectra of light kaonic nuclei by in-flight ($\bar{K},N$) reactions with chiral unitary amplitude
• ppK- bound states from Skyrmions